RAID settings Exchange 2013

Hi,
We're installing an Exchange 2013 server on a Dell R730xd server.
We've provisioned RAID 1 for the OS, and RAID 5 for the DB/log drives.

Can anyone let me know what the recommended settings would be for the RAID config?

I would expect the following :
- Read Policy : Read Ahead
- Write Policy : Write Back
- Disk Cache policy : disabled
- strip size : ? (defaults to 64KB)